Treknology Encyclopedia - J

Jefferies tube
Service corridor in a Federation starship. A network
of Jefferies tubes runs through each starship and provides access
to the various power conduits (EPS), waveguides (ODN) and environmental systems
(generic).Jefferies tubes are named in honor of the late Matt Jefferies, the
ingenious designer of the original starship Enterprise. They are officially
called so since TNG. While all starships must have service corridors of some
sort, it is uncertain where on the various ship classes the may be located.
Ironically, in the otherwise very consistent Enterprise-D design there seems to
be no space left for them. Read more about the topic: Where are the Jefferies Tubes?